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Biochemical Oxygen Demand (BOD) is the amount of oxygen required (in ppm): (1) by anaerobic bacteria to breakdown inorganic waste present in a water body. (2) for the photochemical breakdown of waste present in 1 m3 volume of a water body. (3) by bacteria to break-down organic waste in a certain volume of a water sample. (4) for sustaining life in a water body. |
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Answer» Answer is (3) Biochemical oxygen demand (BOD) is amount of oxygen required by bacteria to break down organic waste in a certain volume of water sample. Answer is (3) can be right if inorganic waste is replaced by organic waste. |
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